diff --git a/Bootstrap.Admin/OnlineUsers/OnlineUser.cs b/Bootstrap.Admin/OnlineUsers/OnlineUser.cs
index 5e783877..690810ba 100644
--- a/Bootstrap.Admin/OnlineUsers/OnlineUser.cs
+++ b/Bootstrap.Admin/OnlineUsers/OnlineUser.cs
@@ -10,31 +10,17 @@ namespace Bootstrap.Admin
     /// </summary>
     public class OnlineUser
     {
-        private ConcurrentQueue<KeyValuePair<DateTime, string>> _requestUrls;
+        private ConcurrentQueue<KeyValuePair<DateTime, string>> _requestUrls = new ConcurrentQueue<KeyValuePair<DateTime, string>>();
 
         /// <summary>
         /// 
         /// </summary>
-        /// <param name="ip"></param>
-        /// <param name="userName"></param>
-        public OnlineUser(string ip, string userName)
-        {
-            Ip = ip;
-            UserName = userName;
-            FirstAccessTime = DateTime.Now;
-            LastAccessTime = DateTime.Now;
-            _requestUrls = new ConcurrentQueue<KeyValuePair<DateTime, string>>();
-        }
+        public string UserName { get; set; }
 
         /// <summary>
         /// 
         /// </summary>
-        public string UserName { get; }
-
-        /// <summary>
-        /// 
-        /// </summary>
-        public DateTime FirstAccessTime { get; }
+        public DateTime FirstAccessTime { get; set; }
 
         /// <summary>
         /// 
diff --git a/Bootstrap.Admin/OnlineUsers/OnlineUsersMiddlewareExtensions.cs b/Bootstrap.Admin/OnlineUsers/OnlineUsersMiddlewareExtensions.cs
index c1783293..102c8f83 100644
--- a/Bootstrap.Admin/OnlineUsers/OnlineUsersMiddlewareExtensions.cs
+++ b/Bootstrap.Admin/OnlineUsers/OnlineUsersMiddlewareExtensions.cs
@@ -22,16 +22,21 @@ namespace Microsoft.AspNetCore.Builder
              await Task.Run(() =>
              {
                  var onlineUsers = context.RequestServices.GetService<IOnlineUsers>();
-                 var clientIp = context.Connection.RemoteIpAddress.ToString();
+                 var clientIp = context.Connection.RemoteIpAddress?.ToString() ?? "::1";
                  onlineUsers.AddOrUpdate(clientIp, key =>
                  {
-                     var ou = new OnlineUser(key, context.User.Identity.Name);
+                     var ou = new OnlineUser();
+                     ou.Ip = clientIp;
+                     ou.UserName = context.User.Identity.Name;
+                     ou.FirstAccessTime = DateTime.Now;
+                     ou.LastAccessTime = DateTime.Now;
                      ou.Method = context.Request.Method;
                      ou.RequestUrl = context.Request.Path;
                      ou.AddRequestUrl(context.Request.Path);
                      return ou;
                  }, (key, v) =>
                  {
+                     v.UserName = context.User.Identity.Name;
                      v.LastAccessTime = DateTime.Now;
                      v.Method = context.Request.Method;
                      v.RequestUrl = context.Request.Path;
diff --git a/UnitTest/Bootstrap.Admin/Api/MySql/OnlineTest.cs b/UnitTest/Bootstrap.Admin/Api/MySql/OnlineTest.cs
new file mode 100644
index 00000000..d79729fd
--- /dev/null
+++ b/UnitTest/Bootstrap.Admin/Api/MySql/OnlineTest.cs
@@ -0,0 +1,10 @@
+using Xunit;
+
+namespace Bootstrap.Admin.Api.MySql
+{
+    [Collection("MySqlContext")]
+    public class OnlineTest : Api.OnlineTest
+    {
+        public OnlineTest(MySqlBAWebHost factory) : base(factory) { }
+    }
+}
diff --git a/UnitTest/Bootstrap.Admin/Api/OnlineTest.cs b/UnitTest/Bootstrap.Admin/Api/OnlineTest.cs
new file mode 100644
index 00000000..7e77fd8f
--- /dev/null
+++ b/UnitTest/Bootstrap.Admin/Api/OnlineTest.cs
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using Xunit;
+
+namespace Bootstrap.Admin.Api
+{
+    public class OnlineTest : ControllerTest
+    {
+        public OnlineTest(BAWebHost factory) : base(factory, "api/OnlineUsers") { }
+
+        [Fact]
+        public async void Post_Ok()
+        {
+            var usres = await Client.PostAsJsonAsync<string, IEnumerable<OnlineUser>>(string.Empty);
+            Assert.Single(usres);
+        }
+
+        [Fact]
+        public async void Get_Ok()
+        {
+            var urls = await Client.GetAsJsonAsync<IEnumerable<KeyValuePair<DateTime, string>>>("::1");
+            Assert.NotEmpty(urls);
+        }
+    }
+}
diff --git a/UnitTest/Bootstrap.Admin/Api/SQLite/OnlineTest.cs b/UnitTest/Bootstrap.Admin/Api/SQLite/OnlineTest.cs
new file mode 100644
index 00000000..1b5733e0
--- /dev/null
+++ b/UnitTest/Bootstrap.Admin/Api/SQLite/OnlineTest.cs
@@ -0,0 +1,10 @@
+using Xunit;
+
+namespace Bootstrap.Admin.Api.SQLite
+{
+    [Collection("SQLiteContext")]
+    public class OnlineTest : Api.OnlineTest
+    {
+        public OnlineTest(SQLiteBAWebHost factory) : base(factory) { }
+    }
+}
diff --git a/UnitTest/Bootstrap.Admin/Controllers/AdminTest.cs b/UnitTest/Bootstrap.Admin/Controllers/AdminTest.cs
index eaca1494..80acdc5b 100644
--- a/UnitTest/Bootstrap.Admin/Controllers/AdminTest.cs
+++ b/UnitTest/Bootstrap.Admin/Controllers/AdminTest.cs
@@ -22,6 +22,7 @@ namespace Bootstrap.Admin.Controllers
         [InlineData("Profiles", "个人中心")]
         [InlineData("Exceptions", "程序异常")]
         [InlineData("Messages", "站内消息")]
+        [InlineData("Online", "在线用户")]
         [InlineData("Tasks", "任务管理")]
         [InlineData("Mobile", "客户端测试")]
         public async void View_Ok(string view, string text)
diff --git a/UnitTest/DB/UnitTest.db b/UnitTest/DB/UnitTest.db
index 1fae2f5f..75955d9b 100644
Binary files a/UnitTest/DB/UnitTest.db and b/UnitTest/DB/UnitTest.db differ